16958-19-3Relevant articles and documents
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Evans,M.B. et al.
, p. 5045 - 5056 (1962)
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Intramolecular Chirality Transfer [2 + 2] Cycloadditions of Allenoates and Alkenes
Xu, Yao,Hong, Young J.,Tantillo, Dean J.,Brown, M. Kevin
supporting information, p. 3703 - 3706 (2017/07/26)
Intramolecular chirality transfer [2 + 2] cycloaddition of enantiomerically enriched allenoates and alkenes is presented. The use of a chiral catalyst was found to be critical to achieve high levels of diastereoselectivity compared to use of an achiral catalyst. The method developed leads to highly substituted cyclobutanes that would be difficult to prepare by alternative methods.
Electronic interactions between a stable electride and a nano-alloy control the chemoselective reduction reaction
Ye, Tian-Nan,Li, Jiang,Kitano, Masaaki,Sasase, Masato,Hosono, Hideo
, p. 5969 - 5975 (2016/08/31)
Controlling the electronic structure of heterogeneous metal catalysts is considered an efficient method to optimize catalytic activity. Here, we introduce a new electronic effect induced by the synergy of a stable electride and bimetallic nanoparticles for a chemoselective reduction reaction. The electride [Ca24Al28O64]4+·(e-)4, with extremely low work function, promotes the superior activity and selectivity of a Ru-Fe nano-alloy for the conversion of α,β-unsaturated aldehydes to unsaturated alcohols in a solvent-free system. The catalyst is easily separable from the product solution and reusable without notable deactivation. Mechanistic studies demonstrate that electron injection from the electride to the Ru-Fe bimetallic nanoparticles promotes H2 dissociation on the highly charged active metal and preferential adsorption of CO bonds over CCs bond of the unsaturated aldehydes, to obtain the thermodynamically unfavorable but industrially important product.
